Process of making oil-pump screen cages



O t. 7, 1930. c. E.-JACOB$- I PROCESS OF IAKING OIL PUMP SCREEN CAGESFiled Sept. 23, 1929 A Shbot's-Sheot 1 INVENTOR ATTORNEY.

PROCESS OF MAKING OIL PUMP SCREEN CAGES Filed Sept. 25, 1929 2Sheets-Sheet 2 INVENTORQ I a. By W ATTO EY.

c. E. JACOBS 1,777,369

Patented Oct. 7, 1930 UNITED STATES CLARENCE E. JACOBS, OF DETROIT,MICHIGAN PROCESS OF MAKING OIL-PUMP SCREEN CAGES Application filedSeptember 23 1929. Serial No. 394,411.

The present invention relates to a process of making screen cages foroil pumps of motor vehicles engines and to the product of such process.

Among the objects of the invention is to greatly cheapen the productionof such cages both by saving material and by simplifying the toolsneeded and their upkeep.

Other objects will readily occur to those skilled in the art uponreference to the following description and the accompanying drawing inwhich Fig. 1 is a plan view of a blank in the first stage of theprocess.

Fig. 2 is an edge view of the same.

Fig. 3 shows the blank after the second ste Fig. 1 shows the partpunched out of the blank and its use as a second blank.

Fig. 5 shows the second punching.

Fig. 6 shows the final form of the part shown in Fig. 3.

Fig. 7 shows the final form of the part shown in Fig. 5, and

Fig. 8 shows a side view of a finished cage.

Fig. 9 illustrates a slightly different method of blanking out the outerspider when a very deep cage is required.

Fig. 10 illustrates the inner spider therefor.

Figs. 11 and 12 show the spiders as formed for welding, and

Fig. 13 shows the finished deep cage.

As indicated, the process comprises first stamping out of suitable sheetmetal, discs 10 of a suitable size and forming upon these a narrowflange 11. These flanged discs are then, by means of a suitable punch,out out to leave a flanged ring 10 having inwardly projecting radialtongues 12.

The punching 13 taken from the tongued ring is used as a blank fromwhich to punch the spider 14.,consisting of a central disc havingoutwardly extending radial tongues 15.

The ring 10 is then, by means of a suitable die, formed as in Fig. 6,that is, the tongues 12 are bent down and curved inwardly as at 16 andeach provided with a shouldered or stepped end 17.

The spider 14L is then also die formed to the shape shown in Fig. 7',that is the tongues 15 areourved upward as at 18 onapproximately thesame radius as the tongues 16. At the same time, the disc portion ofspider 14: is cupped inwardly as at 19 and provided with a centralopening indicated by the dotted line 20 in Fig. 5.

When the parts 10 and 14 have been so formed, the ends of tongues 18 areplaced on the shoulders 17 and welded thereto as at 21, producing theform of cage shown in Fig. 8.

By producing the cage in the manner described, not only is there a greatsaving of material but the stiflness and strength of the material is notimpaired, such as will happen when such cages are produced by drawingout the cup portion prior to cutting away the metal, leaving the ribs,or by cutting away the metal, before drawing. The ribs will have thesame cross sectional area throughout due to the fact that they arestamped from a flat piece and merely bent to form.

Instead of cutting both spiders from the same blank as described above,separate blanks may be used and thereby a deeper cage produced, ifdesired.

Fig. 9 for example, shows the spider arms 12 as almost meeting at thecenter of the blank, only a small square 12 being cut out to separatethem. Fig. 10 shows the other spider as produced from a separate blankand the arms 15 limited in length only by the size of the blank. Afterthese pieces have been properly formed as indicated in Figs. 11 and 12,they are welded as indicated in Figs. 8 or 13 as at 21 to produce a cagesimilar to that of Figs. 1 to 8 but not limited in depth as abovestated.

Now having described the invention and the preferred forms of embodimentthereof, it is to be understood that the said invention is to belimited, not to the specific details herein set forth, but only by thescope of the claims which follow.

Claims:

1. The process of producing screen cages for oil pumps which comprisesforming a disc, punching said disc to leave a ring having inwardlyprojecting radial tongues, cutting from the punched out portion as ablank a spider having outwardly extending radial tongues, bendingdownwardly the several tongues of the rlng and fastening the ends of thefirst tongues to the ends of the second.

2. The'process of producing screen cages for oil pumps which comprisesforming a disc, punching said disc to leave a ring having inwardlyprojecting radial tongues, cut ting from the punched out portion as ablank a spider having outwardly extending radial tongues, bendingdownwardly the several tongues of the ring and upwardly the tongues ofthe spider on approximately the same radius, and fastening the ends ofthe first tongues to the ends of thesecond. 1 I

CLARENCE E. JACOBS.

